Force f=2.0n i - 3.0n k acts on a pebble with position vectorr=0.50m j - 2.0m k relative to the origin. in unit vector notation, what is the resulting torque on the pebble about (a) the origin and(b) the point (2.0m, 0,-3.0m)? a) dot product of f*r=(-3..0m)=6.0nmb) sqrt( 2.0^2+0^2+3.0^2) = sqrt(13)i've tried but not sure. me. you.

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates